Answer: borealis

AnswerCrossword Clue
BOREALISOf the north
BOREALISCorona ..: constellation
BOREALISLiterally, "northern"
BOREALISAurora ...
BOREALISAurora ..
BOREALISAfter aurora
BOREALISAurora ..., sky show
BOREALISAurora -- (northern lights)
BOREALISAurora .....
BOREALISThe "northern" in northern lights
borealisas in aurora borealis, lights seen round the North Pole, cf